Rock-crusher.



PATENTED APR. 28", 1908.

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PATENTED APR. 28, 1908.' J. G. BROWN. I

ROCK ORUSHER.

APPLIOATION PILEDMAR. 15. 1907.

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i a nueul'oz 7MP name/s PETERS J GROVE BROWN, OF KINGSTON, NEW YORK.

ROCK-GRUSHER.

Specification of Letters Patent.

Application filed March 15, 1907. Serial No. 362,520.

Patented April 28, 1908-.

To all whom it may concern:

Be it known that I, J GROVE BROWN, a citizen of the United States,residing at Kingston, in' the county of Ulster and State of New York,have invented certain new and useful Improvements in Rock-Crushers, ofwhich the following is a specification.

My invention comprises certain improvements in the construction ofrock-crushers, the details and advantages of which will be pointed outin the following specification, taken in connection with theaccompanying drawing in which,

Figure 1 is a side elevation of the working parts of the rock-crusher,the frame being shown in central longitudinal section; Fig. 2 is a topplan view of the crusher, one end of the frame being artly broken awayand partly in section; Fig. 3 is a front view of a portion of theswinging jaw with jaw plate attached; Fig. 4 is a side view of one ofthe swinging jaw; Figs. 5 and 6 are, respectively,

bolts for connecting the jaw plate ,to the a side v1ew and centralsection through the hand wheel for adjusting the position of theswinging jaw and the tension of the spring which holds the swinging jawagainst the toggle lever or distance block; Fig. 7 is a perspective viewof the toggle or distance block, and Fig. 8 is a plan view of one of thebrace rods which extend around one end and partly along the sides of thecrusher frame.

Referring to Figs. 1 and 2 of the drawing, A indicates the frame of thecrusher which consists of a hollow casting having the sides 1, 2, andend 3, the sides and said end being formed with horizontal strengtheningribs a. A jaw plate 4 is secured to the end 3, said end and plateforming the stationary jaw of the crusher. The sides of the frame areextended upwardly to form standards 5 in which is arranged a shaft 6from which the swingingjaw or movable member B of the crusherissuspended. This member carries a detachable jaw plate I) which isarranged op osite the stationary jaw plate 4, the plate eing attached tothe swinging jaw as hereinafter more particularly described. Upon arockshaft c, which is suitably journaled on the lower part of the frame,is arranged a rocking-lever C, which has at its free end a roller 7arranged to bear upon a cam or eccentric 8,

the latter being secured to the shaft 9.which carried the driving wheel10 and fly wheel 11 of the crusher. The cam 8 is cylindrical and theroller 7 is kept constantly in engagement form two members of a toggle.lever.

with the surface of the cam by a s ring 12, which latter is arrangedupon a ro 13, pivoted at one end to the frame of the crusher andextending through a suitable opening in the rocking-lever, the spring 12belng interposed between the lever and an adjustable washer 14, which isheld in place upon the end of the rod by-the lock nuts 15. The tensionof the spring 12 may be adjusted by means of the nuts 15, so as to keepthe roller on the lever in constant engagement with the cam withoutundue pressure. The free end of the swinging jaw B is supported inproximity to the stationary jaw of the crusher by a toggle or distanceblock D, one edge of whichfits within a suitable bearing 16, arrangedupon the rocking-lever C near the pivotal point of the latter, while theother edge of the said block fits within a bearing 17, arranged at therear side of the swinging jaw. The rock-lever and distance-block Thisdistance-block is removable and a number of such blocks of varyingwidths are provided and adapted to fit interchangeably within thebearings 16 and 17 so as to vary the distance between the jaws of thecrusher and thus regulate the size of the crushed material.

The swinging-jaw B is held aainst the block D, so that the jaw cannot ethrown away from the block while the crusher is in operation, by meansof a rod 18, pivotally connected. at one end to the swinging-jaw, and aspring 19, arranged upon said rod and interposed between a sto 20 on theframe and a hand Wheel 21, whic is threaded on to the opposite end ofthe rod. The tension of the spring can obviously be regulated by turningthe hand wheel. The rod extends through an opening 20*, in the stop 20and also through an openin 22 in the sto 22, which latter is a part ofthe frame. hen it is desired to remove a block D and insert anotherblock of different size, the hand wheel 21 is turned in the direction torelieve the pressure on the spring 19 and then by continuing to turn thehand wheel in the wheel so that the latter, if constructed in theordinary manner would work loose, unless some locking device wereprovided to lock the wheel to the rod. Instead of providing lockingdevices, I provide a wheel which is over-balanced at one side, so thatthe heavy portion of the wheel will hang below the rod and tend toprevent the rotation of the wheel. As shown in Figs. 5 and 6, the rim ofthe wheel is cut away, as indicated at 21 throughout the greater ortionof its length, while the part 21 is -le t solid or circular in crosssection so that the rim is over balanced at one side and will not turnupon the shaft With the jarring of the machine.

In the operation of rock-crushers the plate on the movable jaw hastendency to work to one side of the jaw, thus causing friction andchafing at one side and leaving a space at the opposite side of thejaw-plate which permits small ieces of stone to either pass through orW6( ge between the j aw-plate and the side of the hopper. In order tosecure the jawplate in position and. prevent this side movement, theupper and lower ends of the jawplate in my invention are rabbeted at thecorners, as indicated by the numerals 23, in Fig. 3, so that the sideportions of the plate are a little shorter than the central portion, andshoulders 24 and 25 are thus provided at the ends of the plate. Thelower end of the plate fits within a long notch 26 in the rib b at thelower end of the swinging-j aw, the shoulders 24 abutting against theend walls of said notch so that side movement of the lower end of theplate is prevented by said end walls. Notches or recesses 27 are cut inthe under face of the rib b of the swinging-j aw, opposite the rabbetedor cut away portions of the upper end of the jaw-plate, and bolt holes28, extend from these notches through the swinging aw. Bolts 29 extendthrough these openings and these bolts are provided with wedge shapedheads 29, which fit partly within the recesses 27 and )artly against theshoulders 25 and thus hold the upper end of the jaw-plate against sidemovement. The up er and lower ends of the awplate are beve ed in theusual manner and the inclined faces 29 (Fig. 4) of the bolts bearagainst the beveled surfaces on the jawplate and thus hold the lattersecurely to the jaw. The shoulders 24 on the jaw-plate be ing the samedistance apart as the shoulders 25, it will be seen that the plate canbe reversed on the 'aw.

The frame is a casting of iron or steel, and it is important that thisframe shall be sufiiciently strong to withstand the severe stress due tocrushing the hardest material and still be light in weight, so that thecrusher can be readily moved from place to place. This object isaccomplished by strengthening the frame, at the points liable tofracture, with a pair of wrought metal reinforcing rods E, E which passaround that end of the frame which supports the stationary jaw, the endportions of the rods extending partly along the sides of the frame, asshown in dotted lines in Fig. 1 and partly in dotted lines and partly infull. lines in Fig. 2. One of these rods is shown in detail in Fig. 8. Arib a, integral with the frame, projects outwardly from the centralportion of the end which supports the stationary aw plate,

and extends vertically between the horizontal flanges a. This ribstrengthens the end of the frame and also forms a strut against whichthe tie or reinforcing rods E bear, the rib and rods forming a trussedconstruction. The rods bear against the outer edge of the ribs a, andthe ends of the rods extend through suitable openings in ribs a on thesides of the frame and are secured b y nuts 6. These rods are heatedbefore being placed on the frame and, after being placed in position,the nuts are tightened. while the rods are hot so that when the rodscool they will have the required tension. These rods extend along thesides of the frame to points at or near a line joining the shafts 6 andc, as the tensile stress due to the resistance of the material betweenthe aws is carried by the frame in.the area between the end of the frameand a line passing through said shafts, and this portion of the frame isparticularly liable to fracture. Experience has demonstrated that suchfracture almost invariably occurs at the corners where the sides jointhe end of the casting, indicating that the tensile strain put upon thesides is combined with a flexural strain due to the yielding of the endof the frame in flexure under the pressure to which it is subjected. Itwill be seen therefore that the reinforcing rods serve the doublepurpose of a truss for preventing the end of the frame from yielding andalso a reinforcement of the sides of the frame.

As the distance-block is arranged so that a combined thrust and toggleaction is produced instead of merely a direct thrust, it will be seenthat the resistance offered to the movement of the operating lever isequalized and, therefore, a less weight and momentum 'is required in thefly-wheels than if only a direct thrust were given to the distanceblock.An important result secured by this arrangement is a material reductionin the pressure on the ournals of the cam shaft and the roller 011 theoperating lever, which minimizes the tendency of these journals to heat.

The entire crusher is designed with a view to making it as light aspossible consistent with the required strength, and to this end theconstruction and arrangement of the various parts is such that thestress on theparts is made as uniform as possible throughout thecrushing movement of the swinging jaw, thus avoiding shocks to the frameand requiring less weight in the fly-wheels, and,

its outer side a centrally located rib or projection, extendingoutwardly beyond the body and forming a strut, and one or more metalreinforcing rods extending around said end and partly along the sides ofthe frame and bearing against the outer surface of said rib orprojection, the ends of said rodor rods being anchored at the sides ofthev frame.

2. In a rock crusher, a hollow frame of cast iron or steel, stationaryand movable jaw plates therein, said stationary jaw plates fittingagainst one end of the frame, and said end being integral with the sidesand having on its outer side horizontal flanges and a centrally located,vertically extending, rib between said fianges, and one or more metalreinforcing rods bearing against the outer side of said rib andextending partly along the sides of the frame, the ends of said rod orrods being secured to the frame.

3. In a rock crusher, a hollow frame, a

stationary jaw plate at one end of the frame, a swinging jaw journaledat the upper part of the frame, a cam shaft having a cam thereon, alever arranged between said shaft and swinging jaw, said lever beingjournaled in the lower part of the frame and having its free endengaging said cam, a toggle or distance block resting against said levernear its ivotal point and supporting the free end of t e swinging jaw, arod connected to said swinging jaw, a pair of stops, a hand wheelthreaded on to said rod between said stops, and a spring interposedbetween said wheel and one of said sto s.

4. In a rock crus erthe combination with fixed and swinging-jaws, of acam shaft, a lever movable thereby, a removable toggle or distance blockarranged between said lever and swinging-j aw, a rod pivotallyconnected, at one end, to the swinging-jaw, a pair of sto s, anadjusting device threaded on to sai rod between said stops, and a springinterposed between said device and one of said stops.

5. In a rock crusher, the combination with fixed and swinging-jaws, of acam shaft, a lever movable thereby, a removable toggle or distanceblock' arranged between said lever and swinging-j aw, a rod pivotallyconnected,

at one end, to the swinging-jaw, a pair of stops, a hand-wheel threadedon to said rod between said stops, said wheel being overbalanced at oneslde, and a spring interposed between said wheel and one of said stops.

In testimony whereof I affix my signature, in presence of two Witnesses.

, J GROVE BROWN. Witnesses:

PHILIP ELTING, O. K. LOUGHRAN.

